Also see Refugies in the Book section. Fleeing the genocidal regime of Pol Pot between 1975 and 1979 and the invasion/liberation of Cambodia by the Vietnamese army, the Khmer population crossed the border to Thailand massively in two waves. In 1991 15000 Cambodians with a refugee status and 300000 displaced still remained in camps along the border. Following the Paris Peace Accords of 1991, the UNHCR repatriated all of them. The last repatriations (Khmer Rouge refugee camps) took place in 1999.